Reciprocating spindle and automatic wheel feed



S. H. NEADY March 26, 1929.

RECIPROCATING SPINDLE AND AUTOMATIC FEED Filed July 2; 1926 4 Sheets-Sheet INVENTOR.

S. H. NEADY March 26, 1929;

RECIPROCATING SPINDLE AND AUTOMATIC WHEEL FEED Filed July 2, 1926 4 Sheets-Sheet 2 INVENTOR.

By I ATfiNEY. f

4 Sheets-Sheet TvT E-ToR.

AT ORNEY.

5. H. NEADY REGIPROGATING SPINDLE AND AUTOMATIC WHEEL FEED Filed July 1926 March 26, 192 9.

S. H. NEADY March 26, 1929.

RECIPROCATING SPINDLE AND AUTOMATIC WHEEL FEED 4 SheetS Sheet. 4

Filed July 1926 INVENTOR.

A elem-2.

Patented Mar. 26, 1929.

UNITED STATESPATENT OFFlCE.

SCOTT H. NEADY, OF WAYNESBORO, PENNSYLVANIA, ASSIGNOR T LANDIS TOOL COMPANY, OF WAYNESBORO, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

Application filed July 2, 1926. Serial No. 120,197.

My said invention relates to a grinding machine having a reciprocating grinding wheel spindle or shaft and an automatic device for feeding the grinding wheel toward the work.

't is an object of the invention to operate from a revolving grinding wheel spindle or shaft means for reciprocating said shaft and additional means for automatically ad- 1 vancing the same toward the work either of which operations may be performed s1- multaneously or independently.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts,

Figure l, is a front elevation of a gr1nding wheel base illustrating the applicatlon of my invention,

Figure 2, an end elevation,

Figure 3, a fragmentary detail section on line 3-3 of Figure 2,

Figure 4, a detail a part of which is in section and a part of which is in side elevation on line 44 of Figure 1,

Figure 5, a fragmentary top plan view of the structure shown in Figure 4,

Figure 6, a front elevation of the worm gear and worm wheel, and

Figure 7, a front elevation showing the arrangement of the work of parts of the automatic feed.

In the drawings reference character indicates a stationary frame upon which is mounted a housing 11 which is adapted to slide thereon. The frame 10 is provided with spaced runners 12 for the reception of supporting elements 13 on the housing. A rack 14 is secured by means of screws 15 longitudinally of the base 10 and parallel to the runners 12 and a shaft 16 is carried by the housing, said shaft having a pinion 17 on its lower end and a worm gear 18 on its upper end, said worm gear 18 engaging a worm supported on a hand wheel shaft 19 having a hand wheel 20 at its outer end. By means of the hand wheel 20 the hand wheel shaft 19 and the shaft 16 may be rotated to cause the housing to travel along the runners for feeding the grinding wheel (not shown) toward and from the work. A grinding wheel spindle or shaft 21 extends longitudinally through the housing and is provided with a worm 22 for ooopera.

The wheel spindle 21 is side of the short arm 38 pivoted on a bracket 39. The upper portion with a worm wheel 23 supported on a stub shaft 24: disposed at substantially right angles to the spindle 21. A yoke 25 is pivoted on a pin 26 in the housing 11 said yoke carrying a pair of pins 27 which extend inwardly into engagement with the yoke shoes 28 contacting with a reduced portion of the grinding wheel spindle 21. Said yoke 25 is provided with a depending bifurcated arm 29 having bearing shoes or bushings 30 in the bifurcation of the end engaging an eccentric 31 carried by the stub shaft 24. By this construction when the eccentric 31 revolves the yoke 25 will be oscillated on its supporting pin 26 carrying with it grinding wheel spindle or shaft 21. driven by a belt 5) from a pulley 8 on a power shaft 7 as shown in Fig. 1.

In order to provide means for feeding the grinding wheel into the work as the same rotates I. mount a cam wheel 32 either on the worm wheel 23 or fixed to rotate therewith and said cam wheel engages a roller supported on a crank arm 3-tuiount ed on one end ofa crank shaft 35 (see Figure 5). A bifurcated trip arm 36 is mounted on the opposite end of the shaft 35 and is adapted to be osoillated upon rotation of the cam, wheel 32 as its periphery engages roller 33. A rod 37 extends through the bifurcated portion of the trip arm and has its lower end slidingly journaled in a mem ber attached to thehousing 11 and has its upper end disposed in a recess in the underof a bell crank lever tion of the rod 37 is screw-threaded and a pair of lock nuts 40 are mounted thereon around which rod and between the lock nuts and the bifurcated arm 36 is disposed a sleeve 41, the lower end of which is adapted to be engaged by the bifurcated trip arm for moving the rod 37 upwardly and oscillating the bell crank lever 38. Attached to the upper longer arm of the bell crank lever 38 is a connecting rod or link 12 which has its opposite end connected to a gear segment 44 supported on a pivot 43.

he gear segment 44 meshes with a gear segment 45 having an arm 16 upon which is supported a pawl 17 for engagement with ratchet wheel 48 upon which the hand wheel 20 mounted A spring 19 normally holds pawl 47 will also be oscillated the pawl 47 in engagement with the ratchet wheel 48. Through the oscillation of the connecting rod 42 the arm 46 carrying the and rotate the ratchet wheel one or more notches. The

amount of feed of the ratchet wheel may be regulated or controlled by means of an adjusting screw 50 threaded through a boss 51 on the housing into engagement with the arm 46. By turning said screw downwardly against the arm 46 the stroke ofthe arm and associated pawl will be shortened and vicevversa. The screw may be set for any desired feed and I preferably provide a look nut 52 for holding the same in said position. 7

In order to permit the reciprocating mechanism for the grinding wheel spindle or shaft to be stopped or interrupted I preferably mount the worm wheel 23 loosely upon the stub shaft 24: and provide a clutch 54 operable by a knob 55 for clutching the worm wheel 23 on the stub shaft. When the worm wheel and stub shaft are clutched together the eccentric 30 will rotate and the yoke 25 will reciprocate the grinding wheel shaft or spindle and at the same time the cam wheel 32 carried by the worm wheel 23 will operate the mechanism for rotating the ratchet wheel 48 and for feeding the grinding wheeli' By disengaging the clutch 54 the reciprocating motion will be stoppedwhile "the'feedingwill go on. If it be desired to stop the feeding mechanism and permit the reciprocating motion to be continued, the nuts40 may be loosened sufficiently to allow the sleeve 41 to ,move freely without operating the push rod 37 whereupon the feeding 'mechanism may be manually accomplished through the hand wheel 20. Similarly to render the reciprocating mechanism inoperative the knob 55 is operated to permit the worm wheel 23 and cam 32 to revolvefreely on the stub 24 whereupon the cam 32 will rock the arm 34 and its associated mechanism to feed the grinder into the work while the reciprocation of the spindlewill be discontinued.

It will be obvious to those skilled in the art that various changes may be made in my device without departing from the spirit of myinvention, and I therefore do not limit myself to what is shown in the drawings and described in the specification, but only as set forth in the appended claims.

Having thus fully described my said invention, What I claim as new and desire to secure by Letters Patent is:

1. In a grinding machine, the combination of a machine frame, a driven shaft, a worm on said shaft, a second shaft extending transversely of the driven shaft, a worm wheel loosely mounted thereon and engaging said worm, a yoke having one end pivotally supported on the frame and being pivotally connected to said driven shaft said yoke having an arm engaging an eccentric on the transverse shaft, means for clutching said worm wheel to said transverse shaft whereby when the transverse shaft is rotated the yoke will be oscillated to reciprocate the driven shaft, a cam carried by said worm wheel, and means comprising feeding mechanism adapted to be operated by said cam to produce a relative movement laterally of said driven shaft between it and the machine frame, substantially as set forth.

2. In a grinding machine, the combination of a machine frame, a driven shaft, a worm on said shaft, a second shaft extending transversely of the driven shaft, a worm wheel loosely mounted thereon and engaging said worm, a yoke having one end pivotally supported on the frame and being pivotally connected to said driven shaft said yoke having an arm engaging an eccentric on the transverse shaft, means for clutching said worm wheel to said transverse shaft whereby when the transverse shaft is rotated the yoke will be oscillated to reciprocate the driven shaft, and mechanism operated by said worm wheel to cause a relative movement laterally of the said driven shaft between it and the machine frame, substantially as set forth.

In witness whereof, I have hereunto set my hand at VVaynesboro, Pennsylvania, this 17th day of June, A. D. nineteen hundred and twenty-six.

SCOTT H. NEADY. 

